Posted by **lufuno nemugumoni** on Saturday, January 21, 2012 at 1:07pm.

A ball mass 500g rolls at a velocity of 2m/s and hits another ball of mass 250g

1.What is the velocity of a small ball if the bigger ball immediately stops after collision?

2.What is the velocity of the bigger ball if it rolls in the same direction with the smaller ball at 0.5m/s?

- physics -
**drwls**, Saturday, January 21, 2012 at 1:22pm
You can answer both questions using conservation of momemtum. You do not have to assume an elastic collision. In fact, neither collision is elastic.

Let the masses of the two balls be M (500 g) and m (250 g). Let Vo be the initial velocity of M.

Let V be the final velocity of the big ball.

Let v be the final velocity of the small ball

1. M*Vo = m*v

v = (M/m)*Vo = 4 m/s

2. M*(2 m/s) = (0.5 m/s)*M + m*v

M*(1.5 m/s) = m*v

v = (M/m)*(1.5 m/s) = 3.0 m/s

## Answer this Question

## Related Questions

- PHYSICS (most is worked) - A glass ball, ball A, of mass 6.0 g moves at a ...
- physics - Ball 2, with a mass of 30kg, is moving to the left at 10m/s. With what...
- physical science - 19. (2 points) Ball 2, with a mass of 30kg, is moving to the ...
- physics - a ball A collides elastically with another ball B initially at rest. A...
- Physics Part 1 - Rick is playing billiards and hits the cue ball. It makes ...
- physics - two balls collide in a head on elastic collision and rebound in ...
- physics - in a game of billiard , a collision occurs between two marble balls of...
- Physics - A 0.50 kg ball is moving with a velocity of 8.0 m/s along a horizontal...
- PHYSICS - Two balls collide on a horizontal, frictionless table. Ball A has a ...
- physics - A billiard ball rolling across a table to the right at 2.2 m/s makes a...

More Related Questions